FNIRSI SWM-20 1200A Dual-Pulse Portable Battery Spot Welder – Professional 2-in-1 Spot Welding Machine for Lithium Battery Pack Building

The FNIRSI SWM-20 1200A Dual-Pulse Portable Battery Spot Welder is a professional-grade 2-in-1 battery spot welding machine designed for hobbyists, electronics technicians, repair engineers, EV battery builders, and industrial users. Featuring a powerful 1200A peak output, advanced dual-pulse welding technology, intelligent safety protection, and a compact portable design, the FNIRSI SWM-20 delivers stable, precise, and efficient spot welding for lithium battery pack assembly and repair.

Whether you are assembling 18650, 21700, 26650, or other cylindrical lithium battery packs, repairing cordless tool batteries, e-bike batteries, electric scooter battery packs, solar storage batteries, or DIY electronics projects, the FNIRSI SWM-20 offers reliable welding performance with excellent consistency.

Unlike conventional spot welders, the FNIRSI SWM-20 utilizes intelligent dual-pulse technology to improve welding quality while minimizing sparks, reducing battery damage, and producing stronger nickel strip connections. Its portable design allows users to carry the machine anywhere, making it an excellent solution for workshops, field repairs, laboratories, educational institutions, and industrial maintenance.

Key Features

Powerful 1200A Peak Welding Current

Provides high-output current for reliable spot welding on various battery packs and nickel strips while maintaining excellent welding consistency.

Advanced Dual-Pulse Welding Technology

Dual-pulse control significantly improves weld penetration and reduces excessive heat, ensuring cleaner welds and better battery protection.

2-in-1 Multifunction Design

Designed for multiple battery welding applications with intelligent operation and excellent compatibility.

Portable & Lightweight

Compact construction allows easy transportation for technicians and field service professionals.

Large Built-in Rechargeable Battery

The integrated rechargeable battery enables cordless operation, making welding more convenient without requiring constant external power.

Intelligent Safety Protection

Built-in protection includes:

• Over-current protection
• Over-temperature protection
• Short-circuit protection
• Low-voltage protection
• Automatic shutdown
• Intelligent system monitoring

These features improve user safety and extend machine lifespan.

Adjustable Welding Levels

Multiple power adjustment levels allow precise welding according to battery type and nickel strip thickness.

High Welding Accuracy

Produces clean welding spots with reduced deformation while improving electrical conductivity.

Durable Construction

Built using premium-quality materials for long-lasting industrial performance.

Easy Operation

Simple controls make the machine suitable for beginners and professionals alike.

Applications

The FNIRSI SWM-20 is suitable for:

• Lithium battery pack building
• Battery pack repair
• 18650 battery welding
• 21700 battery welding
• 26650 battery welding
• Lithium-ion battery maintenance
• Power tool battery repair
• E-bike battery assembly
• Electric scooter battery repair
• Solar battery pack manufacturing
• UPS battery maintenance
• RC battery pack assembly
• DIY electronics projects
• Laboratory testing
• Electronics manufacturing
• Educational training
• Mobile repair workshops
• Industrial battery maintenance

Why Choose FNIRSI SWM-20?

Professionals demand reliability, consistency, and safety. The FNIRSI SWM-20 combines advanced dual-pulse welding technology with intelligent electronic control, delivering superior welding quality compared to many traditional portable spot welders.

Its high-current output helps create stronger weld joints while reducing battery overheating. The compact size allows technicians to work comfortably in tight spaces or carry the welder to customer locations.

Whether you are an experienced battery builder or just starting DIY lithium battery projects, this machine offers the perfect balance between power, portability, and precision.

Technical Highlights

• Product Name: FNIRSI SWM-20
• Product Type: Portable Battery Spot Welder
• Peak Current: 1200A
• Technology: Dual-Pulse
• Design: 2-in-1 Portable Spot Welding Machine
• Battery Type Support: Lithium-ion
• Compatible Cells: 18650, 21700, 26650 and similar cylindrical cells
• Power Adjustment: Multiple Levels
• Safety Protection: Intelligent Multi-Protection System
• Application: Battery Pack Welding & Repair

Package Applications

Perfect for:

• Home Workshop
• Professional Workshop
• Electronics Lab
• Industrial Production
• Educational Institutes
• Field Service Engineers